Identification of genes expressed in the accesory glands of male Mediterranean Fruit Flies (Ceratitis capitata)

Susan J. Davies, Tracey Chapman

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57 Citations (Scopus)


Genes expressed in the male reproductive system exhibit rapid evolutionary change and encode products that underlie striking, fitness-related phenotypes. Despite this, they have been characterised in detail in relatively few species. We report here an initial characterisation of the genes expressed in the male reproductive accessory glands of the Mediterranean Fruit Fly (Ceratitis capitata). We describe 13 independent expressed sequence tags (ESTs), of which 9 showed significant homology to known sequences and of which 4 represented novel sequences. The evidence suggests that our transcripts are not homologues of genes encoding known accessory gland proteins (Acps) in Drosophila melanogaster, but that they do encode proteins that fall into known functional categories for Acps (e.g. proteases, lipases, cysteine-rich secretory proteins [CRISPs]). Our results are consistent with the finding that among Acps there is considerable evolutionary lability at the sequence level, but evolutionary constraint at the functional level. The results highlight the extraordinary diversity of male reproductive genes.
Original languageEnglish
Pages (from-to)846-856
Number of pages11
JournalInsect Biochemistry and Molecular Biology
Issue number11
Publication statusPublished - Nov 2006

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